Senior Web & Mobile Developer

Location: Poland only, fully remote Job Type: B2B, full time Overview Hard Rock Digital is a fiercely focused team working to become the best online sportsbook, casino, and social gaming company in the world. We're building a deeply curious team with a passion for learning, operating, and building new products and technologies for millions of consumers. We're customer-obsessed — we care about each customer interaction, experience, behavior, and insight, and strive to ensure we're always acting authentically. Rooted in the kindred spirits of Hard Rock and the Seminole Tribe of Florida, Hard Rock Digital taps a brand known the world over as the leader in gaming, entertainment, and hospitality. We're taking that foundation of success and bringing it to the digital space - ready to join us? What’s the position? We’re looking to engage a Senior Web & Mobile Engineer based in Poland on a B2B contract basis to support our growing technology function. This is an opportunity to help build and evolve customer-facing experiences across web and mobile, alongside internal Back Office applications used to operate and manage our casino platform. The engagement requires strong React.js expertise and extensive React Native experience, with the ability to deliver across browser-based applications, native mobile platforms, and operational tooling. You will collaborate closely with Product Management, Design, QA, Backend Engineering, Casino Operations, and other stakeholders to deliver secure, performant, and user-centric solutions. The scope includes customer-facing products and Back Office capabilities supporting day-to-day casino operations, configuration, content management, and operational workflows. We’re seeking an experienced engineering professional who has delivered production-grade applications using both React.js and React Native, understands the full client development lifecycle, and can work confidently across web, cross-platform mobile, native platform requirements, and complex internal web applications. Key Responsibilities: - Work in an agile, cross-functional team to deliver the best possible platform experience across web, iOS and Android. - Develop and maintain high-performance web applications in React.js and mobile applications in React Native using TypeScript. - Break down features into requirements, contribute to estimation, refine user stories, and help define appropriate test coverage. - Develop frontend and mobile code to a high standard and perform code reviews for other engineers. - Collaborate with Backend Developers and Architects to design APIs and solve technical challenges across REST, GraphQL and WebSocket integrations. - Support QA, Product and Release Management in moving development items safely to production. - Build and maintain mobile capabilities such as push notifications, background processing/loading and offline/local content storage. - Participate in continuous integration and delivery for web and for Apple App Store / Google Play Store releases. - Use analytics, debugging and performance tooling to understand and continuously improve the end-user experience. - Communicate effectively and proactively in English with Engineering Managers, Product Owners and other stakeholders. - Work effectively in a highly regulated, high-traffic environment.